Mastering Chemistry Chapter 1, Sec 1 & 2
You've asked your friends to define "Chemistry" and "chemical." With what definitions do you agree
A chemical is a substance that has the same composition and properties wherever it is found Chemistry is the study of the composition, structure, properties, and reactions of matter
Analysis of ten ceramic dishes showed that four dishes contained lead levels that exceeded federal safety standards
Observation
Analysis of twelve metallic dishes showed that four dishes contained nickel levels that exceeded federal safety standards
Observation
Classify the following statement as an observation, hypothesis, experiment, or theory. "Soda releases a gas once it is opened"
Observation
Iron nails undergo corrosion in acid rain
Observation
Make notes about nature
Observation
Yesterday, one hour after Sabrina ate scrambled eggs, she develop a stuffy nose and started sneezing
Observation
What experiment set up would be the best way to test your hypothesis
After the exam, give students a survey questioning their study habits and what grade they made on their exam
Formulate a possible explanation for your experimental results
Hypothesis
Sabrina realizes that she does not have an allergy to eggs
Conclusion
State a generalized summary of your experimental results
Conclusion
You call one of your friends to go to a movie on Friday night. He declines your invitation, stating that he needs to study for his upcoming exam on Monday. He states that he scores higher on a exam when he studies for the exam. Despite your efforts to convince him to go to the movie, he stays at home to study for his exam. You decide to use the scientific method to test the hypothesis that students who study for an exam tend to score higher than students who do not study for an exam. In what order should you conduct the following steps to test your hypothesis? Rank from first to last.
Design an experiment, collect data, analyze data, confirm of revise hypothesis
Design an experiment plan that will give new information about a problem
Experiment
The process of testing a hypothesis is called a/an
Experiment
Today, Sabrina had a sandwich with egg-based mayo, but she did not develop a stuffy nose
Experiment
Sabrina thinks she may be allergic to eggs
Hypothesis
What statement is an example of a hypothesis
Leaves turn color in the fall because the amount of sunlight they receive is reduced
A hypothesis is confirmed when
Many experiments validate the hypothesis
Obtain a box of breakfast cereal and read the list of ingredients. What are four chemicals from the list
Monoglycerides, disociemos phosphate, sugar, iron
Scientific Method concept map
Scientific method -- begins with --> an observation -- leads to proposing --> a hypothesis -- is tested or confirmed with --> an experiment-- is analyzed to result in -- a conclusion or theory
